g++GNU C++ Compiler ( g++ ) is a compiler in Linux which is used to compile C++ programs. It compiles both files with extension .c and .cpp as C++ files.The following is the compiler command to compile C++ program.g++ program.cpp -o filenameHere,filename − The name of file with .c or .cpp extension.The following is an example of using g++ compiler.Example Live Demo#include using namespace std; int main() {    int a = 20;    cout

Static variables are variables that remain in memory while the program is running i.e. their lifetime is the entire program run. This is different than automatic variables as they remain in memory only when their function is running and are destroyed when the function is over.The static variables are stored in the data segment of the memory. The data segment is a part of the virtual address space of a program.All the static variables that do not have an explicit initialization or are initialized to zero are stored in the uninitialized data segment( also known as the BSS segment). Compared ... Read More

Increment operators are used to increase the value by one while decrement works opposite increment. Decrement operator decrease the value by one.Pre-increment (++i) − Before assigning the value to the variable, the value is incremented by one.Post-increment (i++) − After assigning the value to the variable, the value is incremented.The following is the syntax of pre and post increment.++variable_name; // Pre-increment variable_name++; // Post-incrementHere,variable_name − Any name of the variable given by user.Here is an example of pre and post increment in C++.Example Live Demo#include using namespace std; int main() {    int i = 5;    cout

The following is an example to add two numbers without using arithmetic operators.Example Live Demo#include #include using namespace std; int add(int val1, int val2) {    while(val2 != 0) {       int c = val1 & val2;       val1 = val1 ^ val2;       val2 = c

The following is an example to convert a character into int.Example Live Demo#include using namespace std; int main() {    char c = '8';    int i = c - 48;    cout

In C language, the void pointers are converted implicitly to the object pointer type. The function malloc() returns void * in C89 standard. In earlier versions of C, malloc() returns char *. In C++ language, by default malloc() returns int value. So, the pointers are converted to object pointers using explicit casting.The following is the syntax of allocating memory in C language.pointer_name = malloc(size);Here, pointer_name − Any name given to the pointer.size − Size of allocated memory in bytes.The following is an example of malloc() in C language.Example Live Demo#include #include int main() {    int n = 4, ... Read More

Global and static variables are initialized to their default values because it is in the C or C++ standards and it is free to assign a value by zero at compile time. Both static and global variable behave same to the generated object code. These variables are allocated in .bss file and at the time of loading it allocates the memory by getting the constants alloted to the variables.The following is an example of global and static variables.Example Live Demo#include int a; static int b; int main() {    int x;    static int y;    int z = 28; ... Read More

The following is an example of swapping two variables.Example Live Demo#include int main() {    int a, b;    printf("Enter the value of a : ");    scanf("%d", &a);    printf("Enter the value of b : ");    scanf("%d", &b);    a += b -= a = b - a;    printf("After Swapping : %d\t%d", a, b);    return 0; }OutputEnter the value of a : 23 Enter the value of b : 43 After Swapping : 4323In the above program, two variables a and b are declared and initialized dynamically at run time.int a, b; printf("Enter the value of ... Read More

Variables are the names given by the user. A datatype is also used to declare and initialize a variable which allocates memory to that variable. There are several datatypes like int, char, float etc. to allocate the memory to that variable.There are two ways to initialize the variable. One is static initialization in which the variable is assigned a value in the program and another is dynamic initialization in which the variables is assigned a value at the run time.The following is the syntax of variable initialization.datatype variable_name = value;Here, datatype − The datatype of variable like int, char, float ... Read More

The following is an example to catch a divide by zero error.Example Live Demo#include using namespace std; int display(int x, int y) {    if( y == 0 ) {       throw "Division by zero condition!";    }    return (x/y); } int main () {    int a = 50;    int b = 0;    int c = 0;    try {       c = display(a, b);       cout